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LM611

www.ti.com

SNOSC08C –MAY 1998–REVISED MARCH 2013

LM611 Operational Amplifier and Adjustable Reference

Check for Samples: LM611

FEATURES

DESCRIPTION

The LM611 consists of a single-supply op-amp and a

OP AMP

programmable voltage reference in one space saving

• Low Operating Current: 300 μA (op amp)

8-pin package. The op-amp out-performs most single-

• Wide Supply Voltage Range: 4V to 36V

supply op-amps by providing higher speed and

bandwidth along with low supply current. This device

• Wide Common-Mode Range: V

−

to (V

−1.8V)

was specifically designed to lower cost and board

• Wide Differential Input Voltage: ±36V

space requirements in transducer, test, measurement

• Available in Low Cost 8-pin DIP

and data acquisition systems.

• Available in Plastic Package Rated for Military

Combining a stable voltage reference with a wide

Temperature Range Operation

output swing op-amp makes the LM611 ideal for

REFERENCE

single supply transducers, signal conditioning and

bridge driving where large common-mode signals are

• Adjustable Output Voltage: 1.2V to 6.3V

common. The voltage reference consists of a reliable

• Tight Initial Tolerance Available: ±0.6%

band-gap design that maintains low dynamic output

• Wide Operating Current Range: 17 μA to 20

impedance (1Ω typical), excellent initial tolerance

(0.6%), and the ability to be programmed from 1.2V

to 6.3V via two external resistors. The voltage

• Reference Floats Above Ground

reference is very stable even when driving large

• Tolerant of Load Capacitance

capacitive loads, as are commonly encountered in

CMOS data acquisition systems.

APPLICATIONS

As a member of TI's Super-Block family, the LM611

• Transducer Bridge Driver

is a space-saving monolithic alternative to a multi-

chip solution, offering a high level of integration

• Process and Mass Flow Control Systems

without sacrificing performance.

• Power Supply Voltage Monitor

• Buffered Voltage References for A/D's

Connection Diagrams

Figure 1. Hermetic Dual-In-Line Package Figure 2. Plastic Surface Mount Narrow Package

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (28 pages)

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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 LM611 Operational Amplifier and Adjustable Reference Check for Samples: LM611 FEATURES 1 OP AMP 2 • • • • • • • • • • • Low Operating Current: 300 μA (op amp) Wide Supply Voltage Range: 4V to 36V Wide Common-Mode Range: V− to (V+−1.8V) Wide Differential Input Voltage: ±36V Available in Low Cost 8-pin DIP Available in Plastic Package Rated for Military Temperature Range Operation REFERENCE Adjustable Output Voltage: 1.2V to 6.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) Voltage on Any Pins Except VR (referred to V− pin) 36V (Max) See (3) −0.
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Electrical Characteristics (1) These specifications apply for V− = GND = 0V, V+ = 5V, VCM = VOUT = 2.5V, IR = 100 μA, FEEDBACK pin shorted to GND, unless otherwise specified. Limits in standard typeface are for TJ = 25°C; limits in boldface type apply over the Operating Temperature Range.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Electrical Characteristics(1) (continued) These specifications apply for V− = GND = 0V, V+ = 5V, VCM = VOUT = 2.5V, IR = 100 μA, FEEDBACK pin shorted to GND, unless otherwise specified. Limits in standard typeface are for TJ = 25°C; limits in boldface type apply over the Operating Temperature Range.
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (Reference) TJ = 25°C, FEEDBACK pin shorted to V− = 0V, unless otherwise noted Reference Voltage vs Temp on 5 Representative Units Reference Voltage Drift Figure 3. Figure 4. Accelerated Reference Voltage Drift vs Time Reference Voltage vs Current and Temperature Figure 5. Figure 6. Reference Voltage vs Current and Temperature Reference Voltage vs Reference Current Figure 7. Figure 8.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (Reference) (continued) TJ = 25°C, FEEDBACK pin shorted to V− = 0V, unless otherwise noted 6 Reference Voltage vs Reference Current Reference AC Stability Range Figure 9. Figure 10. Feedback Current vs Feedback-to-Anode Voltage Feedback Current vs Feedback-to-Anode Voltage Figure 11. Figure 12. Reference Noise Voltage vs Frequency Reference Small-Signal Resistance vs Frequency Figure 13. Figure 14.
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (Reference) (continued) TJ = 25°C, FEEDBACK pin shorted to V− = 0V, unless otherwise noted Reference Power-Up Time Reference Voltage with Feedback Voltage Step Figure 15. Figure 16. Reference Voltage with 100∼ ∼12 μA Current Step Reference Step Response for 100 μA ∼ 10 mA Current Step Figure 17. Figure 18. Reference Voltage Change with Supply Voltage Step Figure 19.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (Op Amps) + − V = 5V, V = GND = 0V, VCM = V+/2, VOUT = V+/2, TJ = 25°C, unless otherwise noted 8 Input Common-Mode Voltage Range vsTemperature VOS vs Junction Temperature Figure 20. Figure 21. Input Bias Current vs Common-Mode Voltage Reference Change vs Common-Mode Voltage Figure 22. Figure 23. Large-Signal Step Response Output Voltage Swing vs Temp. and Current Figure 24. Figure 25.
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (Op Amps) (continued) + − V = 5V, V = GND = 0V, VCM = V+/2, VOUT = V+/2, TJ = 25°C, unless otherwise noted Output Source Current vs Output Voltage and Temp. Output Sink Current vs Output Voltage Figure 26. Figure 27. Output Swing, Large Signal Output Impedance vs Frequency and Gain Figure 28. Figure 29. Small Signal Pulse Response vs Temp. Small-Signal Pulse Response vs Load Figure 30. Figure 31.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Characteristics (Op Amps) (continued) + − V = 5V, V = GND = 0V, VCM = V+/2, VOUT = V+/2, TJ = 25°C, unless otherwise noted 10 Op Amp Voltage Noise vs Frequency Op Amp Current Noise vs Frequency Figure 32. Figure 33. Small-Signal Voltage Gain vs Frequency and Temperature Small-Signal Voltage Gain vs Frequency and Load Figure 34. Figure 35.
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Typical Performance Characteristics (Op Amps) (continued) + − V = 5V, V = GND = 0V, VCM = V+/2, VOUT = V+/2, TJ = 25°C, unless otherwise noted Power Supply Current vs Power Supply Voltage Positive Power Supply Voltage Rejection Ratio Figure 38. Figure 39. Negative Power Supply Voltage Rejection Ratio Slew Rate vs Temperature Figure 40. Figure 41.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Typical Performance Distributions 12 Average VOS Drift Military Temperature Range Average VOS Drift Industrial Temperature Range Figure 44. Figure 45. Average VOS Drift Commercial Temperature Range Average IOS Drift Military Temperature Range Figure 46. Figure 47. Average IOS Drift Industrial Temperature Range Average IOS Drift Commercial Temperature Range Figure 48. Figure 49.
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Typical Performance Distributions (continued) Voltage Reference Broad-Band Noise Distribution Op Amp Voltage Noise Distribution Figure 50. Figure 51. Op Amp Current Noise Distribution Figure 52.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com APPLICATION INFORMATION VOLTAGE REFERENCE Reference Biasing The voltage reference is of a shunt regulator topology that models as a simple zener diode. With current Ir flowing in the ‘forward' direction there is the familiar diode transfer function. Ir flowing in the reverse direction forces the reference voltage to be developed from cathode to anode.
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Capacitors in parallel with the reference are allowed. See the Reference AC Stability Range curve for capacitance values—from 20 μA to 3 mA any capacitor value is stable. With the reference's wide stability range with resistive and capacitive loads, a wide range of RC filter values will perform noise filtering. Adjustable Reference The FEEDBACK pin allows the reference output voltage, Vro, to vary from 1.24V to 6.3V.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Figure 58. Output Voltage has Negative Temperature Coefficient (TC) if R2 has Negative TC Figure 59. Output Voltage has Positive TC if R1 has Negative TC Figure 60. Diode in Series with R1 Causes Voltage Across R1 and R2 to be Proportional to Absolute Temperature (PTAT) Connecting a resistor across Cathode-to-FEEDBACK creates a 0 TC current source, but a range of TCs may be synthesized.
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 I = Vr/R1 = 1.24/R1 Figure 61. Current Source is Programmed by R1 Figure 62. Proportional-to-AbsoluteTemperature Current Source Figure 63. Negative −TC Current Source Hysteresis The reference voltage depends, slightly, on the thermal history of the die. Competitive micro-power products vary—always check the data sheet for any given device. Do not assume that no specification means no hysteresis.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com OPERATIONAL AMPLIFIER The amp or the reference may be biased in any way with no effect on the other, except when a substrate diode conducts (see (1) under Electrical Characteristics). The amp may have inputs outside the common-mode range, may be operated as a comparator, or have all terminals floating with no effect on the reference (tying inverting input to output and non-inverting input to V− on unused amp is preferred).
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Figure 65. Simple Low Quiescent Drain Voltage Regulator. Total Supply Current is approximately 320 μA when VIN = 5V, and output has no load. VOUT = (R1/R2 + 1) VREF. R1, R2 should be 1% metal film. R3 should be low t.c. trim pot. Figure 66. Slow Rise-Time Upon Power-Up, Adjustable Transducer Bridge Driver. Rise-time is approximately 0.5 ms.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com Figure 67. Low Drop-Out Voltage Regulator Circuit. Drop out voltage is typically 0.2V. Figure 68. Nulling Bridge Detection System. Adjust sensitivity via 400 kΩ pot. Null offset with R1, and bridge drive with the 10k pot.
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LM611 www.ti.com SNOSC08C – MAY 1998 – REVISED MARCH 2013 Simplified Schematic Diagrams Figure 69. Op Amp Figure 70. Reference Figure 71.
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LM611 SNOSC08C – MAY 1998 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision B (March 2013) to Revision C • 22 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM611CMX/NOPB SOIC D 14 2500 330.0 16.4 6.5 9.35 2.3 8.0 16.0 Q1 LM611IMX/NOPB SOIC D 14 2500 330.0 16.4 6.5 9.35 2.3 8.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM611CMX/NOPB SOIC D 14 2500 367.0 367.0 35.0 LM611IMX/NOPB SOIC D 14 2500 367.0 367.0 35.
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